Class: RightConf::Platform

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/rconf/platforms/linux.rb,
lib/rconf/platform.rb,
lib/rconf/platforms/darwin.rb,
lib/rconf/platforms/windows.rb

Overview

Linux specific implementation

Constant Summary collapse

FEDORA_REL = 
'/etc/fedora-release'
FEDORA_SIG = 
/Fedora release ([0-9]+) \(.*\)/

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Singleton

included

Instance Attribute Details

#flavor ⇒ Object (readonly)

Returns the value of attribute flavor.



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# File 'lib/rconf/platforms/linux.rb', line 20

def flavor
  @flavor
end

#release ⇒ Object (readonly)

Returns the value of attribute release.



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# File 'lib/rconf/platforms/linux.rb', line 20

def release
  @release
end

Instance Method Details

#darwin? ⇒ Boolean

Is current platform darwin?

Return

true

If current platform is darwin

false

Otherwise

Returns:

  • (Boolean) 


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# File 'lib/rconf/platform.rb', line 47

def darwin?
  return family == :darwin
end

#dispatch(*args, &blk) ⇒ Object

Call platform specific implementation of method whose symbol is returned by the passed in block. Arguments are passed through. e.g.

Platform.dispatch(2) { :echo }

will result in ‘echo_linux(2)’ being executed in self if running on linux, ‘echo_windows(2)’ if running on Windows and ‘echo_darwin(2)’ if on Mac OS X. Note that the method is run in the instance of the caller.

Parameters

args

Pass-through arguments

Block

Given block should not take any argument and return a symbol for the method that should be called

Return

res(ObjecT)

Result returned by platform specific implementation



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# File 'lib/rconf/platform.rb', line 78

def dispatch(*args, &blk)
  raise "Platform.dispatch requires a block" unless blk
  binding = blk.binding.eval('self')
  meth = blk.call
  target = dispatch_candidates(meth).detect do |candidate|
    binding.respond_to?(candidate)
  end
  raise "No platform dispatch target found in #{binding.class} for " + 
        "'#{meth.inspect}', tried " + dispatch_candidates(meth).join(', ') unless target
  binding.__send__(target, *args)
end

#family ⇒ Object

Generic platform family

Return

family(Symbol)

One of :linux, :windows or :darwin



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# File 'lib/rconf/platform.rb', line 25

def family
  @family ||= case RbConfig::CONFIG['host_os']
              when /mswin|win32|dos|mingw|cygwin/i then :windows
              when /darwin/i then :darwin
              when /linux/i then :linux
              end
end

#init ⇒ Object

Initialize flavor and release



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# File 'lib/rconf/platforms/linux.rb', line 23

def init
  system('lsb_release --help > /dev/null 2>&1')
  if $?.success?
    # Use the lsb_release utility if it's available
    @flavor  = `lsb_release -is`.strip.downcase
    @release =  `lsb_release -rs`.strip
  elsif File.exist?(FEDORA_REL) && (match = FEDORA_SIG.match(File.read(FEDORA_REL)))
    # Parse the fedora-release file if it exists
    @distro   = 'fedora'
    @release  = match[1]
  else
    @distro = @release = 'unknown'
  end
end

#linux? ⇒ Boolean

Is current platform linux?

Return

true

If current platform is linux

false

Otherwise

Returns:

  • (Boolean) 


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# File 'lib/rconf/platform.rb', line 38

def linux?
  return family == :linux
end

#windows? ⇒ Boolean

Is current platform windows?

Return

true

If current platform is Windows

false

Otherwise

Returns:

  • (Boolean) 


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# File 'lib/rconf/platform.rb', line 55

def windows?
  return family == :windows
end